橡胶改性沥青流变性能及存储稳定性研究  

Rheological Property and Storage Stability of Rubber Modified Asphalt

作　　者：郑霜杰 李朝炯 程英伟[3] 何晓鸣[3] 秦先涛[3] 

机构地区：[1]内蒙古交通设计研究院有限责任公司,呼和浩特010010 [2]湖北阳新县公路管理局,黄石435200 [3]武汉轻工大学土木工程与建筑学院,武汉430023

出　　处：《交通科技》2016年第6期105-109,共5页Transportation Science & Technology

基　　金：湖北省教育厅科研计划项目(532109016002)资助

摘　　要：采用动态剪切流变仪、弯曲梁流变仪对国创90号,SK 90号和Shell 90号3种基质沥青制备的橡胶改性沥青的常规技术性能、高低温流变性能、抗老化性能和存储稳定性进行研究。结果表明,SK 90号橡胶改性沥青的常规技术性能优于其他两种橡胶改性沥青。64℃时SK 90号橡胶改性沥青的高温抗变形性能最优,但其对温度的敏感性更大,随着温度继续升高,其高温性能劣于国创90号橡胶改性沥青和Shell 90号橡胶改性沥青。国创90号、SK 90号和Shell 90号橡胶改性沥青的高温分级分别为76,82和82℃,而低温分级均为-28℃。但劲度模量和蠕变速率的变化趋势表明,低温抗裂能力由强到弱依次为SK 90号橡胶改性沥青、Shell 90号橡胶改性沥青和国创90号橡胶改性沥青。3种橡胶改性沥青在0~12h内为离析程度最大的时间段;且以SK 90号橡胶改性沥青的热存储稳定性最优。Dynamic shear rheometer and bending beam rheometer were used to research rheological properties,anti-aging performances and storage stabilities of the three rubber modified asphalt.The results indicate that conventional indexes of SK90#rubber modified asphalt are better than the other two asphalts.When the temperature is 64 ℃,the high temperature deformation resistance of SK90#rubber modified asphalt is the optimal,while its high-temperature performance becomes worse than the other two asphalts as temperature rises.The high-temperature PG degree of GC90#rubber modified asphalt,SK90#rubber modified asphalt and Shell90#rubber modified asphalt are 76 ℃,82 ℃and 82℃,respectively,while the low-temperature PG degree are all-28℃.However,the changes of stiffness modulus and creep speed with temperature show that the low-temperature crack resistance ability from strong to weak is SK90#rubber modified asphalt,Shell90#rubber modified asphalt and GC90#rubber modified asphalt.The biggest segregation occurs in the period from 0to 12h;SK90#rubber modified asphalt has the best hot-storage stability among the three rubber modified asphalts above.

关 键 词：道路工程 橡胶改性沥青 高温流变性能 低温流变性能 存储稳定性 

分 类 号：U416.217[交通运输工程—道路与铁道工程]